Engine Block, Aluminum, 6-Bolt Mains, 4.125 in. Diameter Bore, 1-Piece Rear Main Seal, Chevy, LS, Each
Brand:
Edelbrock
Manufacturer's Part Number:
54903U
Part Type:
Engines, Bare Blocks
Product Line:
Edelbrock LS Bare Race Blocks
Summit Racing Part Number:
EDL-54903U
UPC:
00036584209522
Main Journal Type:
Chevy LS
Engine Block Material:
A-357 Aluminum
Engine Block Style:
OEM
Engine Block Deck Height:
Standard deck
Deck Height (in.):
9.240 in.
Cylinder Bore as Shipped:
4.115 in.
Cylinder Bore Diameter:
4.125 in.
Maximum Bore Diameter (in.):
4.165
Camshaft Location:
Standard
Main Bolt Style:
6-bolt
Main Caps Included:
Yes
Main Cap Material:
Steel
Main Cap Fasteners Included:
Yes
Main Bearings Included:
No
Rear Main Seal Style:
1-piece
Finished Cylinder Bores:
No
Raised Cam Location:
Yes
Cam Bearings Included:
No
Freeze Plugs Included:
Yes
Remanufactured:
No
Quantity:
Sold individually.
Special Attention:
Block is bored but needs finish honed.
Edelbrock LS Bare Race Blocks
Edelbrock LS bare race blocks are designed to meet the needs of today's high performance engine builders and racing enthusiasts. They are available in standard and tall deck height combinations and are engineered for maximum clearance around a 4.600 in. stroke crankshaft. With their unique design, Edelbrock engineers were able to minimize windage in the rotating assembly, leading to superior engine lubrication at higher rpm. To make them friendly for existing race applications, these blocks contain both factory and motor plate race mounts for Gen I, II, III, and IV engines. Each LS bare race block receives a CT scan to ensure maximum performance and consistency.

Standard features include:

* Designed from aircraft-quality A357 T-6 aluminum
* Siamese cast bore walls (4.125 in. or 4.165 in. diameter) with press-in cast iron sleeves
* Machined with 55mm cam bearing journal
* Available in standard (9.240 in.) and tall (9.750 in.) deck heights with beefy deck thicknesses (.500 in. standard/.750 in. tall deck); standard (5.87 in.) and tall (6.38 in.) deck cylinder sleeves are available
* 6-head bolt design with full water jacket around cylinder walls; large windows in the valley allow access to an inboard 6th head bolt
* Block design includes large front and rear -12AN side feeds for serious dry sump setups
* Material for oversized lifters with lifter bosses are designed to clear tie bar-style lifters